Color

#28e41b

#28e41b
hex#28e41b
rgbrgb(40, 228, 27)
hslhsl(116, 79%, 50%)
oklchoklch(0.8 0.262 142.2)
Closest name: Alarming Slime (#2ce335)Relative luminance 0.5602

Colors that go with #28e41b

Deep Sky Blue, Taupe and Violet lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#d71be4

#8de41b · #1be472

#1b28e4 · #e41b28

Split-complementary

Open in tool →

#721be4 · #e41b8d

#1b8de4 · #d71be4 · #e4721b

Contrast

#28e41b as textRatioAAAA largeAAAFix
Aaon white
1.72:1failfailfail
  • AA: use #188910 as the text (4.54:1)
  • AAA: use #12640c as the text (7.36:1)
  • AA: or shift the background to #525252 (4.54:1)
  • AAA: or shift the background to #363636 (7.02:1)
Aaon black
12.2:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #28e41b as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #28e41b
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

›analyze #28e41b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/28e41b-a2bea3-8f4edf-1f2d24-eef1e9?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md